For a town in Sweden see Röstånga

Röstånga

Röstånga is a locality situated in Svalöv Municipality, Skåne County, Sweden with 846 inhabitants in 2005.At Röstånga there is an entrance to the Söderåsen National Park. The main entrance is at Skäralid, 5 km further north...

.
Rostanga is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of sea slug

Slug

Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...

s, dorid nudibranch

Nudibranch

A nudibranch is a member of what is now a taxonomic clade, and what was previously a suborder, of soft-bodied, marine gastropod mollusks which shed their shell after their larval stage. They are noted for their often extraordinary colors and striking forms...

s, shell-less marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 gastropod mollusks in the family Discodorididae

Discodorididae

Discodorididae is a taxonomic family of sea slugs, specifically dorid nudibranchs, marine gastropod mollusks in the superfamily Doridoidea. Species in this family belong to the cryptobranch dorid nudibranchs, i.e. they are able to retract their gills into a gill pocket . Most are small and hard to...

.

Alternatively The Sea Slug Forum classifies Rostanga in the family Dorididae.

A phylogenetic analysis shows that the species Rostanga aureamala, Rostanga elandsia, Rostanga pepha and Rostanga setidens form a sister group with the other species in this genus. The species from Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 and the Marshall Islands

Marshall Islands

The Republic of the Marshall Islands , , is a Micronesian nation of atolls and islands in the middle of the Pacific Ocean, just west of the International Date Line and just north of the Equator. As of July 2011 the population was 67,182...

 form the basal clade

Clade

A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...

. The species from the tropical Indo-Pacific are not monophyletic. The species from the Atlantic Ocean

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 and the Eastern Pacific from a clade that is a sister group to R.australis. The Indo-Pacific species Rostanga bifurcata forms a sister group to Rostanga dentacus.

Species

Species within the genus Rostanga include:

• Rostanga alisae Martynov, 2003
• Rostanga aliusrubens Rudman & Avern, 1989
• Rostanga ankyra Valdés, 2001
• Rostanga anthelia Perrone, 1991
• Rostanga arbutus (Angas, 1864)
• Rostanga aureamala Garovoy, Valdés & Gosliner, 2001
• Rostanga bassia Rudman & Avern, 1989
• Rostanga bifurcata Rudman
  William B. Rudman
  Dr. William B. Rudman, usually known as Bill Rudman , from New Zealand and Australia, is a biologist, a researcher who studies molluscs, in other words, a malacologist...
  
   & Avern, 1989
• Rostanga byga Er. Marcus, 1958
• Rostanga calumus Rudman & Avern, 1989
• Rostanga crawfordi (Burn, 1969)
• Rostanga dentacus Rudman
  William B. Rudman
  Dr. William B. Rudman, usually known as Bill Rudman , from New Zealand and Australia, is a biologist, a researcher who studies molluscs, in other words, a malacologist...
  
   & Avern, 1989
• Rostanga elandsia Garovoy, Valdés & Gosliner, 2001 - red sponge nudibranch
  Red sponge nudibranch
  The red sponge nudibranch, Rostanga elandsia, is a species of dorid nudibranch. It is a marine gastropod mollusc in the family Discodorididae.-Distribution:...
  
  
• Rostanga lutescens (Bergh, 1905)
• Rostanga muscula (Abraham, 1877)
• Rostanga orientalis Rudman & Avern, 1989
• Rostanga phepha Garovoy, Valdés & Gosliner, 2001
• Rostanga pulchra
  Rostanga pulchra
  Rostanga pulchra is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae.- Further reading :...
  
  (MacFarland, 1905)
• Rostanga rubra (Risso, 1818)
• Rostanga setidens (Odhner, 1939)

Species brought into synonymy:

• Rostanga australis Rudman
  William B. Rudman
  Dr. William B. Rudman, usually known as Bill Rudman , from New Zealand and Australia, is a biologist, a researcher who studies molluscs, in other words, a malacologist...
  
   & Avern, 1989 : synonym of Rostanga crawfordi (Burn, 1969)
• Rostanga evansi Eliot, 1906 : synonym of Jorunna evansi (Eliot, 1906)
• Rostanga hartleyi Burn, 1958 : synonym of Jorunna hartleyi (Burn, 1958)

Further reading

• Bergh, L. S. R. 1881b. Malacologische Untersuchungen. In: Reisen im Archipel der Philippinen von Dr. Carl Gottfried Semper. Zweiter Theil. Wissenschaftliche Resultate. Band 2, Theil 4, Heft 2, pp 79–128, pls. G, H, J-L.
• Bergh, L. S. R. 1892. Malacologische Untersuchungen. In: Reisen im Archipel der Philippinen von Dr. Carl Gottfried Semper. Zweiter Theil. Wissenschaftliche Resultate. Band 2, Theil 3, Heft 18, pp. 995–1165.
• Eliot, C. N. E. 1910d. A monograph of the British nudibranchiate Mollusca: with figures of the species. pt. VIII (supplementary). Figures by the late Joshua Alder and the late Albany Hancock, and others, pp. 1–198, pls. 1-8. Ray Society, London.
• Fez Sanchez, S. de. 1974. Ascoglosos y Nudibranquios de España y Portugal. Consejo Superior de Investigaciones Científicas, Valencia, pp. 1–325, pls. 1-86.
• Franc, Andre. 1968. Sous-classe des opisthobranches, pp. 608–893. In: E. Fischer, Andre Franc, Micheline Martoja, G. Termier, & H. Termier. Traite de zoologie. Anatomie, systematique, biologie. Tome V, mollusques gasteropodes et scaphopodes (fascicule III), 1083 pp. 1 pl.
• Mcdonald, G. R. 1983. A review of the nudibranchs of the California coast. Malacologia 24(1-2):114-276.
• Mcdonald, G. R., & J. W. Nybakken. 1980. Guide to the nudibranchs of California, including most species found from Alaska to Oregon, 72 pp., 112 photos. American Malacologists.
• Muniain, C., & A. Valdés. 2000. Rostanga byga Er. Marcus, 1958 from Argentina: redescription and comparison to Rostanga pulchra MacFarland, 1905 (Mollusca, Nudibranchia, Doridina). Proceedings of the California Academy of Sciences 52(1):1-10.
• Nordsieck, Fritz. 1972. Die europäischen Meeresschnecken (Opisthobranchia mit Pyramidellidae; Rissoacea), Vom Eismeer bis Kapverden, Mittelmeer und Schwarzes Meer, xiii + 327. Gustav Fischer Verlag, Stuttgart.
• Odhner, Nils Hjalmar. 1907. Northern and Arctic invertebrates in the collection of the Swedish State Museum (Riksmuseum). III. Opisthobranchia and Pteropoda. Kungl. Svenska Vetenskaps Akademiens Handlingar, Neue Følge 41(4):1-113, pls. 1-3.
• Pruvot-Fol, A. 1954b. Mollusques Opisthobranches. Faune de France, Paris 58:1-460, pl. 1.
• Risbec, J. 1953. Mollusques nudibranches de la Nouvelle-Calédonie. Faune de l'Union Française Paris, Libraire Larose 15:1-189.
• Schmekel, R. L., & Adolf Portmann. 1982. Opisthobranchia des Mittelmeeres, Nudibranchia und Saccoglossa. Fauna e flora del Golfo di Napoli 40, Monografia della Stazione Zoologica di Napoli, pp. i-viii, 1-410, pls. 1-36. Springer-Verlag.
• Thiele, J. 1931. Handbuch der Systematischen Weichtierkunde. Band 1, vi + 778 pp. A. Asher & Co., Amsterdam, reprint 1963.
• Thiele, J. 1992. Handbook of Systematic Malacology, part 2 (Gastropoda: Opisthobranchia and Pulmonata). Scientific editors of Translation: Rüdiger Bieler & Paula M. Mikkelsen. xiv + 1189 pp. Smithsonian Institution Libraries & National Science Foundation, Washington, D. C.
• Thompson, T. E. 1975. Dorid nudibranchs from eastern Australia (Gastropoda, Opisthobranchia). Journal of Zoology 176(4):477-517, pl. 1.
• Thompson, T. E. 1988. Molluscs: benthic opisthobranchs (Mollusca: Gastropoda) keys and notes for the identification of the species. Synopses of the British fauna (new series) no. 8, 2nd edition, v + 356 pp. Linnean Society of London & the Estuarine & Brackish-water Sciences Association; E. J. Brill.
• Thompson, T. E., & G. H. Brown. 1984. Biology of opisthobranch molluscs, vol. 2, 229 pp., 41 pls. Ray Society, no. 156.
• Valdés, Á., & T. M. Gosliner. 2001. Systematics and phylogeny of the caryophyllidia-bearing dorids (Mollusca, Nudibranchia), with descriptions of a new genus and four new species from Indo-Pacific deep waters. Zoological Journal of the Linnean Society 133(2):103-198.
• Vayssière, A. J. B. M. 1901a. Recherches zoologiques et anatomiques sur les mollusques Opistobranches du Golfe de Marseille (suite et fin). Memoire No. 1, Annales du Musee d'Histoire Naturelle de Marseille (Zoologie) 6:1-130, pls. 1-7.
• Vayssière, A. J. B. M. 1913a. Mollusques de la France et des régions voisines, tome premier, amphineures, gasteropodes opisthobranches, heteropodes, marseniades et oncidiides. Encyclopedie Scientifique, publiee sous la direction du Dr. Toulouse, Bibliotheque de Zoologie Doin, Paris, pp. 1–420, I-XII, pls. 1-37. [Nudibranchia pp. 243–365].